The CASE CX330, CX330NLC, and CX350 crawler excavators represent robust engineering designed for demanding construction and earthmoving applications. These Tier 3 compliant machines are built for reliability and performance, featuring powerful diesel engines, likely Cummins variants such as the QSB6.7, with displacements around 6.7 liters and power outputs typically ranging from 170 to 200 horsepower. Their hydrostatic tracked drive systems provide excellent maneuverability and stability on various terrains, while their substantial operating weights, generally between 33,000 and 35,000 kg, underscore their capability for heavy-duty tasks. These excavators are engineered to deliver efficient operation and durability in challenging environments. This Factory Service Repair Manual provides comprehensive guidance for the CASE CX330, CX330NLC, and CX350 crawler excavators. It covers essential maintenance procedures, including recommended service intervals for engine oil and hydraulic fluid changes, along with fluid capacity specifications. The manual also delves into technical details of the hydraulic system, such as pump flow rates and system pressure, and outlines performance capabilities like digging depth and reach. This resource is invaluable for owners, technicians, and mechanics seeking to ensure optimal performance, longevity, and safe operation of these machines through detailed repair and maintenance information.